package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ResponseCode;
import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.utill.MD5Util;
import org.apache.commons.configuration.plist.Token;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.util.UUID;
import java.util.logging.Logger;

/**
 * Created by DongGang on 2017/7/29.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        //todo 密码登录MD5
        String md5Password = MD5Util.MD5EncodeUtf8(password);

        User user = userMapper.selectLogin(username,md5Password);
        if (user == null){
            return ServerResponse.createByErrorMessage("密码错误");
        }
        //将密码设置为空
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登陆成功",user);

    }


    public ServerResponse<String> register(User user){
        ServerResponse validResponse = this.checkValid(user.getUsername(), Const.USERNAME);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }

        validResponse = this.checkValid(user.getEmail(), Const.EMAIL);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

        int resultCount = userMapper.insert(user);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    /**}
     *
     * @param str:返回的value值
     * @param type:验证的类型username,email
     * @return
     */
    public ServerResponse<String> checkValid(String str,String type){
        if(StringUtils.isNotBlank(type)){
        //开始校验
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if(resultCount > 0){
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultCount = userMapper.checkEmail(str);
                if(resultCount > 0) {
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        }else{
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    public ServerResponse selectQuestion(String username){
        //验证用户是否存在
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (StringUtils.isNotBlank(question)) {
            return ServerResponse.createBySuccessMessage(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    public ServerResponse<String> checkAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if(resultCount>0){
            //说明问题及问题答案是这个用户的,并且是正确的
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return  ServerResponse.createByErrorMessage("问题的答案错误");
    }

    public ServerResponse<String> forgetRstPassword(String username, String passwordNew, String forgetToken) {
        if (StringUtils.isBlank(forgetToken)) {
            return ServerResponse.createByErrorMessage("参数错误,token需要传递");
        }
        int resultCount = userMapper.checkUsername(username);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
        if (StringUtils.isBlank(token)) {
            return ServerResponse.createByErrorMessage("token无效或过期");
        }
        if (StringUtils.equals(forgetToken, token)) {
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updataPasswordByUsername(username, md5Password);

            if (rowCount > 0) {
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else{
            return ServerResponse.createByErrorMessage("token错误,请重新获取设置重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user) {
        //防止横向越权,校验一下这个用户的旧密码,一定指定是这个用户,因为我们会查询一个count(1),如果不指定id,那么结果就是true啦count>0
        //alt+enter代码提示 优化建议 双击shift在项目目录查找
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if (updateCount > 0) {
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }


    public ServerResponse<User> updateInfomation(User user) {
        //username是不能更新的
        //email,新的email是不是已存在,并且存在的email如果相同的话,不能是我们当前用户的
        int resultResult = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if (resultResult > 0) {
            return ServerResponse.createByErrorMessage("email已存在,请更换enail再尝试更新");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
//        updateUser.setUsername(user.getUsername());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if (updateCount > 0) {
            return ServerResponse.createBySuccess("更新个人信息成功", updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    public ServerResponse<User> getInformation(Integer userId) {
        User user = userMapper.selectByPrimaryKey(userId);
        if (user == null) {
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }


    //backend

    /**
     * 校验是否为管理员
     * @param user
     * @return
     */

    public  ServerResponse checkAdminRole(User user){
        if (user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN) {
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
























}
